Benjamin p



' (Mode1.)

B.F.-SUTTON..

SYRINGE.

No. 319,937. Patented June 9, 1885.

WJTNEEE'ESI I INVENTUH.

UNITED: STATES PATENT Orrrcra BENJAMIN F. SUTTON, OF PROVIDENCE, RHODE ISLAND, ASSIGNOR OF TWO-THIRDS TO RUSSELL PARKER AND JAMES H. STEARNS, BOTH OF BROOKLYN, NEW YORK.

SYRING'E.

SPECIFICATION forming part of Letters Patent No.319,937, dated June 9, 1885.

Application filed February 12, 1885. (Model) To all whom it may concern.-

Be it known that I, BENJAMIN F. SUTTON, of the city and county of Providence, and State of Rhode Island,have invented a new and useful Improvement in Syringes, of which the following is a full and exact description, reference being had to the accompanying drawings, forming part of this specification.

My invention relates to that class of syringes operated by means of an elastic bulb or hollow globe provided with inlet and outlet tubes, in connection with induction and eduction valves.

As heretofore made, syringes of this class when constructed or operated with only one bulb produce an intermittent stream, the liquid ceasing to flow from the discharge-orifice while the bulb is expanding and refilling. \Vhile the bulb is expanding it draws liquid through the suction-tube, and air is invariably drawn back through the outlet-tube before the eduction-valve is seated, or, oftener, through a leaky construction of this valve.

The object of my invention is to produce a simple and durable flexible outlet-conduit for syringes, which will automatically assist in producing a continuous or non-intermittent stream through the discharge-orifice while the bulb is being compressed and relaxed in the usual manner, and thus obviate the admixture of air and liquid when the syringe is in use.

To the above purposes, my invention consists in the peculiar and novel construction of the outlet-conduit of a syringe, as hereinafter described and claimed.

In order that my invention may be fully understood, I will proceed to describe it with reference to the accompanying drawings, in which Figure 1 represents a perspective view of a syringe with the usual valves, flexible bulb, and inlet-tube, and provided with my improved flexible outlet-conduit. Fig. 2 represents a transverse section of the outlet-conduit shown in perspective in Fig. 1. Fig. 3 represents a perspective view of a syringe having an ordinary rigid inlet-tube, the usual induction and eduction valves located near the single neck bulb, and provided with a modified form of my improved flexible outlet-chaunel. Fig. 4 represents a transverse section of the modified outlet-conduit shown in perspective in Fig. 3. Figs. 5 and 6 represent sections in perspective of various modifications in the form ofmy improved flexible outlet-conduits embracing the essential principle of my invention.

Similarletters refer to similar parts throughout theseveral drawings. In the said drawings, 0 designates the outlet-conduit, which is of rubber or other analogous substance. This conduit is constructed in either a corrugated,iuwardly folded,or flattened shape, so as to contract its capacity. It is vulcanized or cured in one of these shapes, and has a tendency to remain so. The openings leading into and from the bulb are made larger than the bore of the discharge-orifice, for the purpose hereinafter explained.

WVith the exception of the heretofore described improved expansible outlet-conduit, my syringe is constructed in the usual manner, with the bulb or pump B, inlet-tube A, induction-valve I, and eduction-valve E.

The action of the syringe having my improved outlet-conduit, as described, is very simple. IVhen the syringe is operated in the usual manner, each pressure upon the bulb B closes the induction-valve I and forces the liquid into the corrugated or flattened conduit 0, and,the flow or escape through the dischargeorifice a being restricted by the size of the bore, the accumulating liquid within the conduit 0 unfolds or expands it into a temporary reservoir. The pressure upon the bulb being relaxed the eduction-valve E closes,and the tendency of the conduit 0 to regain its dormant shape creates an automatic pressure upon the accumulated liquid, which continues to flow through duit can be increased in the manner and for v the discharge-orifice a while the bulb is ex- IOI) the purpose described without essentially augmenting the superficial area of the same.

said tube is expanded when internal pressure is applied and contracted when the pressure 1 is diminished, substantially as set forth and described.

3. In a syringe,the combination of the elastic bulb B, eduction-valve E, and collapsible discharge-tube O, as and for the purposes set 20 forth.

BENJAMIN F. SUTTON.

WVitnesses ROBERT BURROWS, XVILLIAM SOHEDLEY. 

